86172520525 has 48 divisors (see below), whose sum is σ = 136047542400. Its totient is φ = 52663484160.

The previous prime is 86172520519. The next prime is 86172520543. The reversal of 86172520525 is 52502527168.

It is not a de Polignac number, because 86172520525 - 2⁵ = 86172520493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 587095 + ... + 719044.

It is an arithmetic number, because the mean of its divisors is an integer number (2834323800).

Almost surely, 2^86172520525 is an apocalyptic number.

It is an amenable number.

86172520525 is a deficient number, since it is larger than the sum of its proper divisors (49875021875).

86172520525 is a wasteful number, since it uses less digits than its factorization.

86172520525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306198 (or 1306193 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 86172520525 in words is "eighty-six billion, one hundred seventy-two million, five hundred twenty thousand, five hundred twenty-five".